Parallel-ruler for sign-writers



(No Model.)

A. J. WALKER. PARALLEL RULER FOR SIGN WRITERS.

Patented May 17, 1887.

I m i111:

NITED TATES ATENI Erica,

ALBERT J. IVALKER, OF SHELDON, MISSOURI.

PARALLEL-RULER FOR SlGN WRlTERS.

SPECIFICATION forming part of Letters Patent No. 363,025, dated May 17, 1887.

Serial No. 228,448. (No model.)

To (1% whom it may concern.-

Be it known that I, ALBERT J. \VALKER, a citizen of the United States, residing at Sheldon, in the county of Vernon and State of Missouri, haveinvented certain new and useful Improvements in Parallel Rulers for Sign- IVriters; and I hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

This invention relates to parallel-rulers for the use of sign-writers and others who have occasion to mark off letters of various sizesand styles.

This invention consists in the novel con struction and combination of the parts here inafter fully described and claimed.

In the drawings, Figure 1 is a front view of the complete instrument. Fig. 2 is a crosssection through the frames, showing the end of one of the bars. Fig. 3 is a diagrammatic representation of how the differently-shaped letters are formed by this instrument.

A is the inner frame of the instrument, which is jointed together at the corners, something like the frame of a school-slate.

B is a series of bars having each a socket, b, at each end. These sockets slide upon the opposite parallel portions of the frame, and the bars cross each other. Six bars are used to slide in each direction; but their number can be increased or diminished to suit different styles of work and to make letters of various width of face.

0 is the outer frame, which is made in two parts. Each part of the frame 0 is provided with a hinged joint, 0, something like that of an ordinary pocket-rule, and the said joints are secured to the opposite corners of the inner frame, A, by means of the tongues c, which are let into it. Any desired scale, 0' such as inch or other divisionsis stamped upon the sides of the outer frame for convenience in setting the sliding bars.

D are thumb-screws, which pass through holes in each free end of the outer frame and are screwed into the inner frame.

E is a strip of half-round rubber, which is secured upon the inside of each part of the outer frame next to the inner frame.

The inner and outer frames are connected together, so that the sockets of the bars may slide freely when the thumbscrews are slack; but the bars will be firmly held by the rubber strips when the said thumb-screws are tightened up.

Fig. 3 shows how the instrument is made to produce different kinds of lettering. A pencil or marker is passed along the bars, and the outline of each letter is blocked out separately. The slanting portions of letters are filled in afterward; but this is very easy to do, as the points to be joined can all be marked off by the instrument.

\Vhat I claim is- 1. In a parallel-ruler, the combination of the inner frame, a series of bars sliding upon the opposite parallel portions of the said frame, and an outer frame, and thumb-screws for clamping the sliding bars in any desired position.

2. In a parallel-ruler, the combination of the inner frame, a series of bars having sockets at each end, which slide upon the opposite parallel portions of the said frame, and an outer frame, and thumb-screws for clamping the sockets and holding the sliding bars in any desired position.

3. In a parallelruler, the combination of the inner frame, a series of bars sliding upon the opposite parallel portions of the said frame, an outer frame having strips of rubber secured upon its edges, and thumb-screws for clamping the frames together and securing the bars.

4. In a parallel-ruler, the combination of the inner frame, the series of bars having sockets at each end, the outer frame made in two parts and pivotally connected to the opposite corners of the inner frame, and the thumb-screws for clamping the sockets of the sliding bars between the frames, substantially as and for the purpose set forth.

5. In a parallel-ruler, the combination of the inner frame, the series of bars having sockets at each end, the outer frame made in two parts and pivotally connected to the 0pposite corners of the inner frame, the strips of IOO rubber secured upon the edges of the outer the thumb-screws for clamping the sockets of frame, and the thumb-screws for clamping the the sliding bars between the frames, substansockets of the sliding bars between the frames, tially as and for the purpose set forth.

substantially as and for the purpose set forth. In testimony whereofI affix my signaturein 5 6. In a parallel-ruler, the combination of presence of two witnesses.

the inner frame, the series of bars having sockets at each end, the outer frame made in ALBERT B' two parts and pivot-ally connected to the op- Witnesses: posite corners of the inner frame, a scale of J. G. CAMPBELL,

[O divisions stamped upon the outer frame, and A. J. MAYO. 

